Question

我是bootstrap的新手。这是我想要的设计：

正如您所看到的那样，导航栏位于背景图像的顶部。这就是我所拥有的：

 <!DOCTYPE html>
    <html lang="en">
    <head>
               <meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
<script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/js/bootstrap.min.js"></script>

<style>
        <style>
.navbar-default {
background: none;
border: none;
}

body{
    height:100%;
}
        html{
            background: url('sun.jpg') no-repeat center center fixed;
            -webkit-background-size:cover;
            -moz-background-size:cover;
            -o-background-size:cover;
            background-size:cover;
            background-position: 0 0;

        }
        </style>

    </head>
<body>

        <nav class="navbar navbar-default">
            <div class="container">
                <ul class="nav navbar-nav"> 
                    <li class="active"><a href="#">home</a></li>
                    <li><a href="#">ask a question!</a></li>
                    <li><a href="#">learn</a></li>
                    <li><a href="#">contact</a></li>
                </ul>
            </div>

        </nav>

</body>
</html>

给出：

我不知道如何把它放在图像本身而不是上面。

简短的问题：是什么让vimeo的照片看起来比我从太阳使用的图像好得多？在我的图像上你可以看到所有的像素等...这是因为它可能是一个太小的图像，它必须拉伸很多，以适应整个页面？

编辑：

这是我尝试但没有用的

    <nav class="navbar navbar-default">
        <div class="container">
            <ul class="nav navbar-nav"> 
                <li class="active"><a href="#">home</a></li>
                <li><a href="#">ask a question!</a></li>
                <li><a href="learn.html">learn</a></li>
                <li><a href="#">contact</a></li>
            </ul>
            <style>
            .navbar{
                background:transparent;
            }
            </style>
        </div>

    </nav>

Answer 1

Bootstrap 4

Navbar没有背景颜色，因此默认情况下它是透明的。请记住使用navbar-light或navbar-dark，以便链接颜色与背景图像的对比度一起使用。显示toggler is also based on navbar-(dark or light)。

https://www.codeply.com/go/FTDyj4KZlQ

<nav class="navbar navbar-expand-sm fixed-top navbar-light">
    <div class="container">
        <button class="navbar-toggler navbar-toggler-right" type="button" data-toggle="collapse" data-target="#navbar1">
            <span class="navbar-toggler-icon"></span>
        </button>
        <a class="navbar-brand" href="#">Brand</a>
        <div class="collapse navbar-collapse" id="navbar1">
            <ul class="navbar-nav">
                <li class="nav-item active">
                    <a class="nav-link" href="#">Link</a>
                </li>
            </ul>
        </div>
    </div>
</nav>

Bootstrap 3

使用navbar-fixed-top然后更改CSS以使其透明。以下是自定义透明导航栏的示例。 http://www.codeply.com/go/JNy8BtYSem

  <nav id="nav" class="navbar navbar-fixed-top" data-spy="affix">
    <div class="container">
        <div class="navbar-header">
      <a href="#" class="navbar-brand">Brand</a>
      <a class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse">
        <i class="fa fa-bars"></i>
      </a>
      </div>
      <div class="navbar-collapse collapse">
        <ul class="nav navbar-nav">
          <li><a href="#">Link</a></li>
          <li><a href="#">Link</a></li>
        </ul>
        <ul class="nav pull-right navbar-nav">
          <li>
           <a href="#">Link</a>
          </li>
        </ul>
      </div>        
    </div>
  </nav>

Answer 2

您需要从导航栏中删除背景：

.navbar-default {
    background: none;
}

＆＃13;

<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet"/>

<style>
html,
body {
  height: 100%;
	background: red;
}

.navbar-default {
    background: none;
  	border: none;
}
</style>

<!-- Wrap all page content here -->
<div id="wrap">
  
  <!-- Fixed navbar -->
  <div class="navbar navbar-default navbar-fixed-top">
    <div class="container">
      <div class="navbar-header">
        <button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse">
          <span class="icon-bar"></span>
          <span class="icon-bar"></span>
          <span class="icon-bar"></span>
        </button>
        <a class="navbar-brand" href="#">Project name</a>
      </div>
      <div class="collapse navbar-collapse">
        <ul class="nav navbar-nav">
          <li class="active"><a href="#">Home</a></li>
          <li><a href="#about">About</a></li>
          <li><a href="#contact">Contact</a></li>
          <li class="dropdown">
            <a href="#" class="dropdown-toggle" data-toggle="dropdown">Dropdown <b class="caret"></b></a>
            <ul class="dropdown-menu">
              <li><a href="#">Action</a></li>
              <li><a href="#">Another action</a></li>
              <li><a href="#">Something else here</a></li>
              <li class="divider"></li>
              <li class="dropdown-header">Nav header</li>
              <li><a href="#">Separated link</a></li>
              <li><a href="#">One more separated link</a></li>
            </ul>
          </li>
        </ul>
      </div><!--/.nav-collapse -->
    </div>
  </div>
  
</div>

＆＃13;

Answer 3

.navbar{
    background:transparent;
}

这将使您的背景透明。

Answer 4

只需在Body中拍摄背景图像，然后使用此代码

             <div class="navbar navbar-inverse navbar-fixed-top">
              <div class="container">
                <div class="navbar-header">
                  <button type="button" class="navbar-toggle" data-         
                toggle="collapse" data-target=".navbar-collapse">
                    <span class="icon-bar"></span>
                    <span class="icon-bar"></span>
                    <span class="icon-bar"></span>
                  </button>
                  <a class="navbar-brand" href="#">Brand</a>
                </div>
                <div class="collapse navbar-collapse">
                  <ul class="nav navbar-nav">
                    <li class="active"><a href="#">Home</a></li>
                    <li><a href="#about">About</a></li>
                  </ul>
                  <ul class="nav navbar-nav navbar-right">
                    <li><a href="#">Username</a></li>
                  </ul>
                </div>
              </div>
            </div>

            <div class="wide">
                <div class="col-xs-5 line"><hr></div>
                <div class="col-xs-2 logo">Logo</div>
                <div class="col-xs-5 line"><hr></div>
            </div>

            <div class="container">
              <div class="text-center">
                <h1>Content</h1>
              </div>
            </div>

也使用样式样式=＆＃34;不透明度：0.6;＆＃34;在Navbar div

bootstrap - 如何将导航栏放在背景图像上？

4 个答案: